Nickel phosphide nanocatalysts for the chemoselective hydrogenation of alkynes

Abstract

Elsevier Carenco, S.; Leyva Perez, A.; Concepción Heydorn, P.; Boissiere, C.; Mezailles, N.; Corma Canós, A. (2012) Well-defined 25 nm nickel phosphide nanoparticles act as a colloidal catalyst for the chemoselective hydrogenation of terminal and internal alkynes. Cis-alkenes are obtained in mild conditions (85°C, a few hours) with good conversion and selectivity. The phosphorus inserted in the Ni-P nanoparticles is critical for the selectivity of the nanocatalyst. Mechanistic investigations support a pre-reduction of the catalyst for its activation. They pinpoint the occurrence of C-H bond cleavage in terminal alkynes during the reaction.

Preparation of Ni 2 P/Al 2 O 3 by temperature-programmed reduction of a phosphate precursor with a low P/Ni ratio

“…Metal-rich transition-metal phosphides (e.g., Ni 2 P, MoP, WP, CoP, and Co 2 P) are promising catalysts for a variety of reactions such as hydrotreating, hydrogenation, hydrodeoxygenation, and hydrogen evolution [1][2][3][4]. Among the transition-metal phosphides, Ni 2 P has attracted particular attention due to its high catalytic performance and resistance to poisoning [5,6].…”

Facile synthesis and superior supercapacitor performances of Ni2P/rGO nanoparticles

“…[19][20][21] Nickel phosphides may be synthesized through the reduction of phosphates and phosphinates, solid state metathesis at high temperatures, low-temperature solvothermal methods, plasma methods, and so on. 19,[28][29][30][31] Hence, it is necessary to explore novel synthetic process of nickel phosphide which are environmental, inexpensive, simple and convenient. 19,[28][29][30][31] Hence, it is necessary to explore novel synthetic process of nickel phosphide which are environmental, inexpensive, simple and convenient.…”

Stable Zero‐Valent Nickel Nanoparticles in Glycerol: Synthesis and Applications in Selective Hydrogenations

“…[33] The lower values of coercive fields and remanence magnetization of nickel nanoparticles in glycerol (NiA) than those observed for nanoparticles in solid state (NiA(s)) can be related to the higher amount of capping agents around the metal nanoparticles (i. e. both glycerol and quinidine), leading to a magnetic material constituted by a crystalline core surrounded by a "disordered" surface. [7] Supported catalysts including Cu-and NiÀAl hydrotalcites, [9] nickel phosphide nanoparticles, [10] NiNPs decorated on polyaniline/graphite oxide composite [12] and RhÀNi nanoflowers immobilized in a metal organic framework, [13] have been used for the selective hydrogenation of alkynes obtaining moderate to good yields, but generally under harsh conditions, showing unsuccessful catalyst recycling. The work developed by Yus and co-workers using Ni(0) nanoparticles obtained in situ by reduction of nickel (II) salts in THF, led to a highly active catalytic system for the reduction of dienes and both internal and terminal alkynes, obtaining the corresponding alkenes in high yields under room conditions; however, this catalytic system could not be efficiently recycled.…”

“…For the synthesis of (Z)-alkenes from internal alkynes and also for the synthesis of alkenes from terminal alkynes, several methodologies have been applied, such as i) Lindlar catalyst, [3] including lead-free metal-based systems; [4] ii) complex reducing agents of the type NaH-NaOR-MX n [5] and iii) dispersed nickel metal on graphite. [7][8][9][10][11][12][13] In the last decade, the skillful synthesis of welldefined NiNPs has attracted the attention of several research groups, being the main challenge the exclusive formation of Ni(0) nano-materials due to the easy oxidation of zero-valent nickel species. In recent years, nickel catalysts and in particular supported nickel nanoparticles including nickel-based alloys, have been studied, due to their ability to selectively hydrogenate alkynes into alkenes.…”